Search for Dirac Magnetic Monopoles in e+e- Collisions with the OPAL Detector at LEP2

OPAL Collaboration

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This Letter describes a direct search for pair produced magnetic monopoles in e+e− collisions. The analysis is based on 62.7 pb−1 of data collected with the OPAL detector at an average centre-of-mass energy of s=206.3GeV. The monopole signal was assumed to be characterized by two back-to-back particles with an anomalously high ionization energy loss dE/dx in the tracking chambers. No evidence for production of monopoles was observed. Upper limits were obtained on the magnetic monopole pair-production cross-section (σ) in the mass range 45GeV/c2<mM<102GeV/c2. The average limit is σ<0.05pb and is essentially independent of the magnetic monopole mass. The cross-section limit is derived at the 95% confidence level and is valid for spin-1/2 magnetic monopoles.
    Original languageEnglish
    Pages (from-to)37-42
    Number of pages6
    JournalPhysics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume663
    Issue number1-2
    DOIs
    Publication statusPublished - 15 May 2008

    Keywords

    • MONTE-CARLO SIMULATION
    • 2-PHOTON PRODUCTION PROCESSES
    • HIGHLY IONIZING
    • PARTICLES
    • LOWEST ORDER CALCULATIONS
    • RADIATIVE-CORRECTIONS
    • CHARGED-PARTICLES
    • EVENT GENERATOR
    • HIGH-ENERGY
    • STATES
    • POINT

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